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Details of Retention and Purchase of MSRs (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value |  |  | $ 11,976 | $ 28,614
Mortgage Servicing Rights |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 11,807 | 16,148 | 14,666 | 28,614
Associated Principal | 1,196,493 |  | 1,469,773 |
Mortgage Servicing Rights | Jumbo MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 2,186 |  | 2,674 |
Associated Principal | 257,201 |  | 315,994 |
Mortgage Servicing Rights | Jumbo MSR Additions | Securitization |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 2,186 |  | 2,186 |
Associated Principal | 257,201 |  | 257,201 |
Mortgage Servicing Rights | Jumbo MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value |  |  | 488 |
Associated Principal |  |  | 58,793 |
Mortgage Servicing Rights | Conforming MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 9,621 |  | 11,992 |
Associated Principal | 939,292 |  | 1,153,779 |
Mortgage Servicing Rights | Conforming MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 7,495 |  | 9,302 |
Associated Principal | 725,339 |  | 880,437 |
Mortgage Servicing Rights | Conforming MSR Additions | From purchases |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Value | 2,126 |  | 2,690 |
Associated Principal | $ 213,953 |  | $ 273,342 |

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- Definition Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746 + Details
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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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